Alright, let's work through 6389 times 3274 step by step
6389 × 3274 = 3274 × (6389)
+ 3274 × 9 that equals 29466
+ 3274 × 80 that is equal 261920
+ 3274 × 300 which equals 982200
+ 3274 × 6000 that equals 19644000

= 20917586
